First, the SN voice is a complete synth, based on an old chip from Texas Instruments.
This chip was used in a lot of Atari games, from what I've read, and is interesting because it has most of the elements required for making sond right on board.
In the picture, my tape loop organ is basically an old tape deck that I will hack with a piano-type keyboard, which will control the speed of the playback. The loops can also be played in reverse. I'm hoping to figure out a way to play both tapes at the same time for some "chords."
Also, I'd like to make a double cassette, and use the unit as a delay, with modulation of speed and feedback! The space where you see the circuit board will have all the controls and patch points, I"m hopiong to incorperate: tape direction for both tapes, record/erase enable, lfo modulation, master spead, and feedback for the delay.
Last but not least is a modified Atari Punk Console (aka Forest Mims' Stepped Tone Generator). This version of the circuit, by Squarewave Parade, is called "Blast Fed Disaster". Mine has to be rebuilt, but I'm really happy with the modular style layout, and am looking forward to bulding more modules in this fasion. The 3 holes on the bottom are cv inputs and the output